Classification Originally established as an order containing Ellobiidae, Trimusculidae and all the Stylommatophora. Ranked as superorder by H. Nordsieck (1993: 48.
The supposed clade Eupulmonata = [Ellobioidea + Trimusculoidea + Stylommatophora +
(maybe) Otinoidea and Systellommatophora ] (used in Southern Synthesis as Order) is here omitted due to current controversy. Barker (2001) and Dayrat & Tillier (2002) support a monophyletic group (Geophila) including the Systellommatophora [= Onchidioidea+Veronicelloidea] and Stylommatophora, whereas H. Nordsieck (1993a)
considered the Ellobioidea the sister-group of the Stylommatophora. Conversely, the molecular phylogenetic analysis of Dutra-Clarke et al. (2001) and Grande et al. (2004) has Eupulmonata polyphyletic, with (tentatively!) Ellobioidea as sister-group of all other Euthyneura. [details]